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Asian Pac J Trop Med ; 5(6): 476-9, 2012 Jun.
Article in English | MEDLINE | ID: mdl-22575982

ABSTRACT

OBJECTIVE: To describe the anatomical characteristics and patterns of neurovascular compression (NVC) in patients suffering trigeminal neuralgia (TN) by 3D high-resolution magnetic resonance imaging (MRI) method and image fusion technique. METHODS: The anatomic structure of trigeminal nerve, brain stem and blood vessel was observed in 100 consecutive TN patients by 3D high resolution MRI (3D SPGR, contrast-enhanced T1 3D MP-RAGE and T2/T1 3D FIESTA). The 3D image sources were fused and visualized using 3D DOCTOR software. RESULTS: One or several NVC sites, which usually appeared 0-9.8 mm away from brain stem, were found on the symptomatic side in 93% of the TN cases. Superior cerebellar artery was involved in 76% (71/93) of these cases. The other vessels including antero-inferior cerebellar artery, vertebral artery, basilar artery and veins also contributed to the occurrence of NVC. The NVC sites were found to be located in the proximal segment in 42% of these cases (39/93) and in the distal segment in 45% (42/93). Nerve dislocation or distortion was observed in 32% (30/93). CONCLUSIONS: Various 3D high resolution MRI methods combined with the image fusion technique could provide pathologic anatomic information for the diagnosis and treatment of TN.


Subject(s)
Brain Stem/pathology , Nerve Compression Syndromes/pathology , Trigeminal Nerve/pathology , Trigeminal Neuralgia/pathology , Arteries/pathology , Cerebellum/blood supply , Humans , Imaging, Three-Dimensional , Magnetic Resonance Angiography/methods , Magnetic Resonance Imaging/methods , Vasoconstriction/physiology , Veins/pathology
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